Name and Age Check

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Description:

This JavaScript checks to see if the name and age for a form contain valid characters.

JavaScript Functions:
<SCRIPT LANGUAGE="JavaScript"> <!-- 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>

HTML Script:
<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>