{"id":1992,"date":"2012-06-01T08:40:37","date_gmt":"2012-06-01T08:40:37","guid":{"rendered":"http:\/\/www.greytrix.com\/blogs\/sagecrm\/?p=1992"},"modified":"2012-06-01T08:40:37","modified_gmt":"2012-06-01T08:40:37","slug":"javascript-to-calculate-days-difference-between-dates-duration","status":"publish","type":"post","link":"https:\/\/www.greytrix.com\/blogs\/sagecrm\/2012\/06\/01\/javascript-to-calculate-days-difference-between-dates-duration\/","title":{"rendered":"JavaScript to Calculate days difference between dates (Duration)"},"content":{"rendered":"

Handling the date fields is usually a tricky part in development work. Sometimes it is termed as programmer\u2019s nightmare as lots of formatting and validation complications are involved when working on the same from client side script. Recently we had a requirement where we had to get the duration between 2 dates and display the same in a third field. We usually get a lot of knowledge base to achieve the same from server side but we had to achieve the same from client side script. This needed to work when the fields were populated i.e. during onchange.
\nThe below script helps us to achieve this functionality. This code needs to be added in the Onchangescript block of both the date fields.
\n\/\/’Calculate duration value<\/strong>
\nfunction CalculateDuration()
\n{
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/’Form message<\/em>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 var sMessage = “”;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 var valid = true;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/’Get value of start date<\/em>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 var dStartDate = new String(document.EntryForm.task_cstartdate.value);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if(dStartDate ==”” || dStartDate ==”null” || dStartDate ==”undefined”) dStartDate =””;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/’Get value of end date<\/em>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 var dEndDate = new String(document.EntryForm.task_cenddate.value);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if(dEndDate ==”” || dEndDate ==”null” || dEndDate ==”undefined”) dEndDate =””;
\n\/* Please note that this script works if the user date format is in mm\/dd\/yyyy, <\/strong>else make sure the date needs to be changed to this format before using this script. *\/<\/em>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/’Perform validations<\/em>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if(dStartDate>dEndDate)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 alert(‘End Date must be greater than Start Date.’);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 valid=false;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 else
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 var SDuration = 0;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/Set 1 day in milliseconds<\/em>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 var one_day=1000*60*60*24
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/’calculate duration<\/em>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SDuration = (dEndDate.getTime()-dStartDate.getTime())\/one_day;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SDuration = new String(SDuration)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if(SDuration==”NaN”)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SDuration = “”;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 document.getElementById(“_Datatask_cduration”).innerText = SDuration;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 document.EntryForm._HIDDENtask_cduration.value=SDuration;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 valid=true;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return valid;
\n}<\/p>\n","protected":false},"excerpt":{"rendered":"

Handling the date fields is usually a tricky part in development work. Sometimes it is termed as programmer\u2019s nightmare as lots of formatting and validation complications are involved when working on the same from client side script. Recently we had a requirement where we had to get the duration between 2 dates and display the\u2026 Read More »<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[105,200,332],"tags":[],"class_list":["post-1992","post","type-post","status-publish","format-standard","hentry","category-date-validation","category-javascript-sage-crm","category-sage-crm"],"yoast_head":"\nJavaScript to Calculate days difference between dates (Duration) - Sage CRM \u2013 Tips, Tricks and Components<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.greytrix.com\/blogs\/sagecrm\/2012\/06\/01\/javascript-to-calculate-days-difference-between-dates-duration\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaScript to Calculate days difference between dates (Duration) - Sage CRM \u2013 Tips, Tricks and Components\" \/>\n<meta property=\"og:description\" content=\"Handling the date fields is usually a tricky part in development work. Sometimes it is termed as programmer\u2019s nightmare as lots of formatting and validation complications are involved when working on the same from client side script. Recently we had a requirement where we had to get the duration between 2 dates and display the\u2026 Read More »\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.greytrix.com\/blogs\/sagecrm\/2012\/06\/01\/javascript-to-calculate-days-difference-between-dates-duration\/\" \/>\n<meta property=\"og:site_name\" content=\"Sage CRM \u2013 Tips, Tricks and Components\" \/>\n<meta property=\"article:published_time\" content=\"2012-06-01T08:40:37+00:00\" \/>\n<meta name=\"author\" content=\"greysagecrm\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"greysagecrm\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.greytrix.com\/blogs\/sagecrm\/2012\/06\/01\/javascript-to-calculate-days-difference-between-dates-duration\/\",\"url\":\"https:\/\/www.greytrix.com\/blogs\/sagecrm\/2012\/06\/01\/javascript-to-calculate-days-difference-between-dates-duration\/\",\"name\":\"JavaScript to Calculate days difference between dates (Duration) - Sage CRM \u2013 Tips, Tricks and Components\",\"isPartOf\":{\"@id\":\"https:\/\/www.greytrix.com\/blogs\/sagecrm\/#website\"},\"datePublished\":\"2012-06-01T08:40:37+00:00\",\"author\":{\"@id\":\"https:\/\/www.greytrix.com\/blogs\/sagecrm\/#\/schema\/person\/e7ff1c8f4763b47730d6bc5e74d59c1f\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.greytrix.com\/blogs\/sagecrm\/2012\/06\/01\/javascript-to-calculate-days-difference-between-dates-duration\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.greytrix.com\/blogs\/sagecrm\/2012\/06\/01\/javascript-to-calculate-days-difference-between-dates-duration\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.greytrix.com\/blogs\/sagecrm\/2012\/06\/01\/javascript-to-calculate-days-difference-between-dates-duration\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.greytrix.com\/blogs\/sagecrm\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"JavaScript to Calculate days difference between dates (Duration)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.greytrix.com\/blogs\/sagecrm\/#website\",\"url\":\"https:\/\/www.greytrix.com\/blogs\/sagecrm\/\",\"name\":\"Sage CRM \u2013 Tips, Tricks and Components\",\"description\":\"Explore the possibilities with Sage CRM insights through our comprehensive blogs. 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