<!-- TWO STEPS TO INSTALL INFORMATION VALIDATION: 1. Paste the coding into the HEAD of your HTML document 2. Put the last code into the BODY of your HTML document --> <!-- STEP ONE: Copy this code into the HEAD of your HTML document --> <HEAD> <SCRIPT LANGUAGE="JavaScript"> <!-- This script and many more are available online from --> <!-- The JavaScript Source!! http://javascriptsource.com --> <!-- Begin function validate(){ var digits="0123456789" var temp if (document.testform.Name.value=="") { alert("No Name !") return false } if (document.testform.age.value=="") { alert("Invalid Age !") return false } for (var i=0;i<document.testform.age.value.length;i++){ temp=document.testform.age.value.substring(i,i+1) if (digits.indexOf(temp)==-1){ alert("Invalid Age !") return false } } return true } // End --> </SCRIPT> <!-- STEP TWO: Copy this code into the BODY of your HTML document --> <BODY> <FORM name="testform" onSubmit="return validate()"> Name:<input type="text" size=30 name="Name"> Age:<input type="text" size=3 name="age"> <input type="submit" value="Submit"> </FORM> <!-- Script Size: 1.16 KB -->

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