function insertAtCursor(myField, myValue) 
{ 

	if (document.selection) 
	{ 
		myField.focus(); 

		sel = document.selection.createRange(); 
		sel.text = myValue; 
	} 
	else if (myField.selectionStart || myField.selectionStart == '0') { 

		var startPos = myField.selectionStart; 
		var endPos = myField.selectionEnd; 
		myField.value = myField.value.substring(0, startPos)+ myValue+ myField.value.substring(endPos, myField.value.length); 
	} 
	else
	{ 
		myField.value += myValue; 
	} 
}