function getKeyCode(e)// v1.0
		{
		if (window.event)
		return window.event.keyCode;
		else if (e)
		return e.which;
		else
		return null;
		}
		function dogum_mask(e,id,veri){
		deger = document.getElementById(id);
		key = getKeyCode(e);
		if(key == 8){
		if( veri.length == 2 ) deger.value = veri.substr(0,veri.length-1)	
		if( veri.length == 5 ) deger.value = veri.substr(0,veri.length-1)
		}else{
		if( veri.length == 2 )deger.value = deger.value + '.';
		if( veri.length == 5 )deger.value = deger.value + '.';
		}
		}
		
		 
		function telefon_mask(e,id,veri){
		deger = document.getElementById(id);
		key = getKeyCode(e);
		if(key == 8){
		if( veri.length == 1 ) deger.value = veri.substr(0,veri.length-1)	
		if( veri.length == 5 ) deger.value = veri.substr(0,veri.length-2)
		if( veri.length == 6 ) deger.value = veri.substr(0,veri.length-3)
		if( veri.length == 9 ) deger.value = veri.substr(0,veri.length-1)
		if( veri.length == 12 ) deger.value = veri.substr(0,veri.length-1)
		}
		else{
		if( veri.length == 1 )deger.value = '(' + deger.value ;
		if( veri.length == 4 )deger.value = deger.value + ') ';
		if( veri.length == 9 )deger.value = deger.value + ' ';
		if( veri.length == 12 )deger.value = deger.value + ' ';
		}
		}
		
		function vergi_no_mask(e,id,veri){
		deger = document.getElementById(id);
		key = getKeyCode(e);
	
		if(key == 8){
		if( veri.length == 3 ) deger.value = veri.substr(0,veri.length-1)	
		if( veri.length == 7 ) deger.value = veri.substr(0,veri.length-1)
		}else{
		if( veri.length == 3 )deger.value = deger.value + '-';
		if( veri.length == 7 )deger.value = deger.value + '-';
		}
		}