window.onload = function() {
    var oDiv = document.getElementById("tab");
    var oLi = oDiv.getElementsByTagName("div")[0].getElementsByTagName("li");
    var aCon = oDiv.getElementsByTagName("div")[1].getElementsByTagName("div");
    var timer = null;
    for (var i = 0; i < oLi.length; i++) {
        oLi[i].index = i;
        oLi[i].onclick = function() {
            show(this.index);
        }
    }
    function show(a) {
        index = a;
        var alpha = 0;
        for (var j = 0; j < oLi.length; j++) {
            oLi[j].className = "";
            aCon[j].className = "";
            aCon[j].style.opacity = 0;
            aCon[j].style.filter = "alpha(opacity=0)";
        }
        oLi[index].className = "cur";
        clearInterval(timer);
        timer = setInterval(function() {
            alpha += 2;
            alpha > 100 && (alpha = 100);
            aCon[index].style.opacity = alpha / 100;
            aCon[index].style.filter = "alpha(opacity=" + alpha + ")";
            alpha == 100 && clearInterval(timer);
        },
        5)
    }
}

function addlayerdiv_hide2(){
	$('#customExtent').fadeOut();
	$('#leftbottom').val('');
	$('#righttop').val('');
}
function projectExtentclose(){
	$('#projectExtent').fadeOut();
}
function num_change(){ 
    var num=$('#range_num').val();
    $("#num").html(num+"级");
} 
function qie(can){
	if(can==1){
		$("#qie2").removeClass("shezhi_check");
		$("#qie1").addClass("shezhi_check");
		$("#tabCon2").css({"display":"none"});
		$("#tabCon1").css({"display":"block"});
	}else{
		$("#qie1").removeClass("shezhi_check");
		$("#qie2").addClass("shezhi_check");
		$("#tabCon1").css({"display":"none"});
		$("#tabCon2").css({"display":"block"});
	}
}

jQuery.divselect = function(divselectid,inputselectid) {
	var inputselect = $(inputselectid);
	$(divselectid+" cite").click(function(){
		var ul = $(divselectid+" ul");
		if(ul.css("display")=="none"){
			ul.slideDown("fast");
		}else{
			ul.slideUp("fast");
		}
	});
	$(divselectid+" ul li a").click(function(){
		var txt = $(this).html();
		$(divselectid+" cite").html(txt);
		var value = $(this).attr("selectid");
		inputselect.val(value);
		$(divselectid+" ul").hide();
	});
};