Code:
<HTML> <BODY> <SCRIPT LANGUAGE="JavaScript"> <!-- Hide code from older browsers var num1 = new RegExp("[0-9]", "g") function gears() { if (!num1.test(document.gears1.ring1.value)) { alert("bad" + document.gears1.ring1.value + "<<") return false } alert("good" + document.gears1.ring1.value + "<<") return false } // End hiding--> </SCRIPT> <FORM onsubmit="return gears()" NAME="gears1"> <P> <INPUT TYPE="TEXT" SIZE="10" NAME="ring1"> <INPUT TYPE="BUTTON" VALUE="Calculate" ONCLICK="gears()"> </FORM> </BODY> </HTML>
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