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64 lines
2.2 KiB
64 lines
2.2 KiB
/* To include this script into an xhtml page without copying and pasting it in
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add the following tags into your xhtml page. Please note that these comments are
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only valid within .js (JavaScript files),
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do not include them if you wish to use this script within an xhtml document.
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<script type="text/javascript" src="./validate.js"></script>
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or copy and paste the script into your document head enclosed in
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<script type="text/javascript"></script> tags
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add the following in place of your usual <body> tag
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<body onload="document.form1.yourname.focus();">
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variable names variable descrition
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yourname first name input
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yoursurname second name input
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addy email address
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*/
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function validate(){
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if (document.form1.yourname.value.length<3){
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alert("Please enter your full Forname");
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document.form1.yourname.focus();
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return false;
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}
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if (document.form1.yoursirname.value.length<3){
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alert("Please enter your full Sirname.");
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document.form1.yoursirname.focus();
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return false;
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}
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if (document.form1.addy.value.length < 5){
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alert("Please enter a complete email address in the form: yourname@yourdomain.com")
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document.form1.addy.focus();
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return false;
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}
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var addystring = document.form1.addy.value;
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var ampIndex = addystring.indexOf("@");
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var afterAmp = addystring.substring((ampIndex + 1), addystring.length);
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var dotIndex = afterAmp.indexOf(".");
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dotIndex = dotIndex + ampIndex + 1;
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afterAmp = addystring.substring((ampIndex + 1), dotIndex);
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var afterDot = addystring.substring((dotIndex + 1), addystring.length);
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var beforeAmp = addystring.substring(0,(ampIndex));
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var addy_regex ="^[a-zA-Z0-9_\-\.]+@[a-zA-Z0-9_\-]+\.[a-zA-Z0-9_\-\.]+$";
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if ((addystring.indexOf("@") != "-1") &&
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(addystring.length > 5) &&
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(afterAmp.length > 0) &&
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(beforeAmp.length > 1) &&
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(afterDot.length > 1) &&
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(addy_regex.test(addystring)) ) {
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return true;
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}
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else{
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alert("Invalid! Please enter a complete email address in the form: yourname@yourdomain.com")
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document.form1.addy.focus();
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return false;
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}
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}
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