Thanks. I have corrected the mistakes and able to compile. But I it is working ie. does not call that function (ValidateForm). No alert message is coming. This is the part of the JScript.

function ValidateForm(){
       var Phone=document.inFOrm.Mobile
       alert("In JS")
        if ((Phone.value==null)||(Phone.value=="")){
                alert("Please Enter your Phone Number")
                Phone.focus()
                return false
        }
}
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