function getCharacterWidth(txtArea, fontSize){
	var characterWidth = 0;
	var temp1 = 0;
	var temp2 = 0;
		
	txtArea.attr("style", "font-size:" + fontSize + "px");
	txtArea.attr("cols", 1);
	temp1 = txtArea.outerWidth();
	txtArea.attr("cols", 2);
	temp2 = txtArea.outerWidth();
	characterWidth = temp2 - temp1;
	
	return characterWidth;
}

function calculateWidth(){
	var txtArea = jQuery("#txtInputArea");
	var cols = jQuery("#txtCols").val();
	var fontSize = jQuery("#txtFontSize").val();
	var borderWidth = 6;
	var characterWidth = 0;
	var width = 0;
	
	characterWidth = getCharacterWidth(txtArea, fontSize);
	
	width = (characterWidth * cols) + borderWidth;
	jQuery("#spnResult").text(width);
}