function checkTotal(){
x =document.form1.textfield.value 
if (x > 120){
alert("You Are Exceed 120mm");
document.form1.textfield.value.search(/\S/) == -1
document.form1.textfield.value='';
document.getElementById("textfield").focus();
}
}
function checkTotal1(){
y = document.form1.textfield2.value;
if (y > 180){
alert('You Are Exceed 180mm');
document.form1.textfield2.value.search(/\S/) == -1
document.form1.textfield2.value='';
document.getElementById("textfield2").focus();
}
}
function checkTotal2(){
z =document.form1.textfield3.value
if (z > 25){
alert('You Are Exceed 25mm');
document.form1.textfield3.value.search(/\S/) == -1
document.form1.textfield3.value='';
document.getElementById("textfield3").focus();
}

}
function calculate()
{
 var x;
 var y;
 var z;
 x=document.form1.textfield.value;
 y=document.form1.textfield2.value;
 z=document.form1.textfield3.value;
 var tot=parseInt(x)+parseInt(y)+parseInt(10)*parseInt(z);
 document.form1.textfield22.value=tot;
}