/**
 * 统计图
 * t - 类型
 * y - 年份
 * g - 图型
 * prov - 省份
 */
function makeChart(t, y, g, prov){
	if (!prov) {
		prov = "";
	}
    var graph = g;
    
    var width = document.getElementById("picframe").scrollWidth - 50;
	//var height = document.getElementById("picframe").scrollHeight;
	var height = 750;
    
	var frame = document.getElementById("picframe");
	var begin = document.getElementById("begin"); // 起始月份
	begin = begin.options[begin.selectedIndex].value;
	
	var end = document.getElementById("end"); // 终止月份
	end = end.options[end.selectedIndex].value;
	var mod = graph == 1 ? 2 : 1;
	frame.src = "webchart?"
				 + "b=" + begin
				 + "&e=" + end
				 + "&g=" + graph
				 + "&mod=" + mod
				 + "&w=" + width
				 + "&h=" + height
				 + "&t=" + t
				 + "&provs=" + encodeURI(prov);
}