function CheckSearch (form)
{
	for (i=0; i<form.elements.length; i++)
	{	
		if (form.elements[i].type == "text" && form.elements[i].value != "") break
		
		else if (i == (form.elements.length -1))
    	{
        	alert ("You didn't enter any part numbers.")
        	form.elements[0].focus ()
        	return false
        }
     }   
        
	for (i=0; i<form.elements.length; i++)
	{   
        if (form.elements[i].type == "text" && form.elements[i].value != "")
        {
        	var partNumber = new String (form.elements[i].value)
			var regexp = /'/
        	var singlequote = partNumber.search (regexp)
        	
			if (!(singlequote == -1))
			{
				alert ("Single quotes are not allowed.")
				form.elements[i].focus ()
				return false
			}
		
			partNumber = partNumber.toUpperCase ()
			
			oneCharPrefix = partNumber.substring (0, 1)
			twoCharPrefix = partNumber.substring (0, 2)
			
			if (oneCharPrefix == "C")
			{
				partNumber = partNumber.substring (1, partNumber.length)
			}
			
			else if (isNaN (twoCharPrefix))
			{
				partNumber = partNumber.substring (2, partNumber.length)
			}
			
			form.elements[i].value = partNumber
        }
    }
    
    form.action = 'listing.asp'
}