// The basis for this script @ http://javascript.internet.com/forms/format-phone-number.html
// Original:  Roman Feldblum (web.developer@programmer.net)
// Then adapted it to be more flexible
// added the numeric only to keep people from entering non numeric values

/*

to use add a line to your form like this

<input type=text name=txtphone maxlength="13" onclick="FormatPhone('field name');" onkeypress="return numbersonly(event);">




*/



function FormatPhone(n){

	var obj;
	var n;
	var p;
	var p1;
	
	obj = document.getElementById(n);

	n=obj.name;
	p1=obj
	
	p=p1.value
	
		
	if(p.length==3){
		pp=p;
		d4=p.indexOf('(')
		d5=p.indexOf(')')
		if(d4==-1){
			pp="("+pp;
		}
		if(d5==-1){
			pp=pp+")";
		}
		obj.value="";
		obj.value=pp;
	}
	
	
	if(p.length>3){
		d1=p.indexOf('(')
		d2=p.indexOf(')')
		if (d2==-1){
			l30=p.length;
			p30=p.substring(0,4);
			p30=p30+")"
			p31=p.substring(4,l30);
			pp=p30+p31;
			obj.value="";
			obj.value=pp;
		}
	}
	if(p.length>5){
		p11=p.substring(d1+1,d2);
		if(p11.length>3){
		p12=p11;
		l12=p12.length;
		l15=p.length
		//l12=l12-3
		p13=p11.substring(0,3);
		p14=p11.substring(3,l12);
		p15=p.substring(d2+1,l15);
		//document.frmPhone.txtphone.value="";
		obj.value="";
		pp="("+p13+")"+p14+p15;
		//document.frmPhone.txtphone.value=pp;
		obj.value=pp;
		}
		l16=p.length;
		p16=p.substring(d2+1,l16);
		l17=p16.length;
		if(l17>3&&p16.indexOf('-')==-1){
			p17=p.substring(d2+1,d2+4);
			p18=p.substring(d2+4,l16);
			p19=p.substring(0,d2+1);
			//alert(p19);
		pp=p19+p17+"-"+p18;
		obj.value="";
		obj.value=pp;
		}
	}
	

	setTimeout('FormatPhone("' + n + '")',100);
}

function numbersonly( e ) {
	var unicode = e.charCode ? e.charCode : e.keyCode;
	
	if( unicode == 8 )  // Backspace
		return true;
	if( unicode == 9)	// Tab
		return true;

	if( unicode < 48 || unicode > 57 ) { //if not a number
		//disable key press
		return false;
	} else {
		// enable keypress
		return true;
	}//end else
}