function isNum(InString_1)
{
        if(InString_1.length==0) return false;
        var RefString="+1234567890-.";
        for(Count=0;Count<InString_1.length;Count++)
        {
                 var TempChar=InString_1.substring(Count,Count+1);
                if(RefString.indexOf(TempChar,0)==-1)
                        {
                                return (false);
                        }
        }
        return(true);
}
function check(form)
{
 var vinMin = form.VinMin.value;
 var vinMax = form.VinMax.value;
 var abs_Vout1 = Math.abs(form.O1V.value);
 if (form.VinMin.value == "")
 {
	alert("Please enter \"VinMin\" voltage.");
 	form.VinMin.value=14.0;
 	return false;
 }
 if (form.VinMax.value == "")
 {
 	alert("Please enter \"VinMax\" voltage.");
 	form.VinMax.value=22.0;
 	return false;
 }
 //if (parseFloat(vinMax) > 60)
 //{
 //	alert("You can not enter \"Vin Max \" voltage more than 60 V.");
 //	form.VinMax.value=22.0;
 //	return false;
 //}
 if (form.O1V.value == "")
 {
 	alert("Please enter \"Output 1 V out\".");
        form.O1V.value=3.3;
 	return false;
 }
 if ((form.op_TA.value == "") || (form.op_TA.value <= -273))
 {
 	alert("Please enter \"Ambient temperature\". It must be greater than absolute zero.");
 	form.op_TA.value=30;
 	return false;
 }
 if ((form.O1I.value == "") || (form.O1I.value <= 0))
 {
 	alert("Please enter \"Output 1 I out\". It must be greater than zero.");
        form.O1I.value=2;
 	return false;
 }
 if (parseFloat(vinMax) < parseFloat(vinMin))
 {
 	alert(" \"Vin Max\" must be greater than or equal to \"Vin Min\". ");
 	return false;
 }
}