js自定义个性下拉选择框示例_javascript技巧

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$(".droparrow").click(function(e){
var quest = $(this).parent();
var questwidth = parseInt(quest.width());
var questheight = quest.height();
var left = quest.offset().left;
var top = parseInt(quest.offset().top)+parseInt(questheight)+4;
var attrs = quest.attr("quest");
var selectsd = $('.chooseItems[answer='+attrs+']');
var selectsdHeight = selectsd.height();
if((top+selectsdHeight)>$(window).height()){
top = top - selectsdHeight - questheight-7;
}
if($(selectsd).is(":visible")){
$(selectsd).hide();
}else{
$(selectsd).css({"left":left+"px","top":top+"px","width":questwidth+"px"}).show();
}
});
$(".dropdiv").click(function(e){
var quest = $(this).parent();
var questwidth = parseInt(quest.width());
var questheight = quest.height();
var left = quest.offset().left;
var top = parseInt(quest.offset().top)+parseInt(questheight)+4;
var attrs = quest.attr("quest");
var selectsd = $('.chooseItems[answer='+attrs+']');
var selectsdHeight = selectsd.height();
if((top+selectsdHeight)>$(window).height()){
top = top - selectsdHeight - questheight-7;
}
if($(selectsd).is(":visible")){
$(selectsd).hide();
}else{
$(selectsd).css({"left":left+"px","top":top+"px","width":questwidth+"px"}).show();
}
});
$(".chooseItem").click(function(e){
var divhtml = $(this);
var displayMember,valueMember;
displayMember = divhtml.attr("displayMember");
valueMember = divhtml.attr("valueMember");
var attrs =$(this).parent().attr("answer");
var parent = $("#"+attrs);
var olddisplayMember,oldvalueMember;
olddisplayMember = parent.attr("displayMember");
oldvalueMember = parent.attr("valueMember");
if(olddisplayMember !=displayMember){
parent.attr("displayMember",displayMember);
parent.attr("valueMember",valueMember);
parent.html(valueMember);
parent.change();
}

$(this).parent().hide();
});
$(".dropdiv").change(function(e){
alert($(this).attr("valueMember"));
});
$(".dropmiandiv").mouseleave(function(e){
var quest = $(this).attr("quest");
$('.chooseItems[answer='+quest+']').hide();
});
$(".chooseItems").mouseenter(function(e){
$(this).show();
});
$(".chooseItems").mouseleave(function(e){
$(this).hide();
});