dropdown.js

DP代码加解释~~~在网手收集起来的论文解题报告

//Matt Kruse-javascripttoolbox.com-MIT/GPL
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var dropdown_init=1, dropdown_n=0;

window['dropdown'+dropdown_n+'_srch_focused']	=false;
window['dropdown'+dropdown_n+'_show_all']		=false;

function dropdown_get_this_button_index(t){
	var a=document.getElementsByName('dropdown_dd');
	for(i=0;i<a.length;i++){
		if(t==a[i]) return i;
	}
}
function dropdown_disp(w,v){if(w)document.getElementById(w).style.display=v;}
function dropdown_onMouseOut_delay(){
	if(!window['dropdown'+dropdown_n+'_srch_focused'])
		window['dropdown'+dropdown_n+'_delay']=setTimeout("dropdown_toggle_dropdown('none')",501);
}
function dropdown_onMouseOver_stay() {
	if(typeof window['dropdown'+dropdown_n+'_delay']!="undefined")clearTimeout(window['dropdown'+dropdown_n+'_delay']);
}
function dropdown_toggle_dropdown(t){
	document.getElementById('dropdown'+dropdown_n+'_dropdown').style.display=t;
}
function dropdown_showAll(t){
	if(!window['dropdown'+dropdown_n+'_show_all']){
		srvcs=document.getElementById('dropdown'+dropdown_n+'_dropdown').getElementsByTagName('a');
		for(i=0;i<srvcs.length;i++)
			dropdown_disp(srvcs[i].id,'');
		t.innerHTML="Add to Any";
		
		window['dropdown'+dropdown_n+'_show_all']=true;
		return false;
	}
}
function dropdown_show_srch(a){
	if(a.value=="Find service..."){
		a.value="";
		a.style.color="#000";
		a.focus();
	}
}
function dropdown_do_srch(curr_search){
	srvcs=document.getElementById('dropdown'+dropdown_n+'_dropdown').getElementsByTagName('a');
	colm1_lnks=document.getElementById('dropdown'+dropdown_n+'_colm1').getElementsByTagName('a');
	colm2_lnks=document.getElementById('dropdown'+dropdown_n+'_colm2').getElementsByTagName('a');
	if(document.getElementById('dropdown'+dropdown_n+'_srch').value!=''){
		for(i=0;i<srvcs.length;i++){
			s=srvcs[i].id;
			s_fix=(s.substr(4+(String(dropdown_n).length)).toLowerCase()).replace('_',' ');
			if(s_fix.indexOf(curr_search.toLowerCase())!=-1) dropdown_disp(s,'');
			else dropdown_disp(s,'none');
		}
	}
	else{
		for(i=0;i<colm1_lnks.length;i++) 
			if(i<6) dropdown_disp(colm1_lnks[i].id,'');
			else dropdown_disp(colm1_lnks[i].id,'none');
		for(i=0;i<colm2_lnks.length;i++) 
			if(i<6) dropdown_disp(colm2_lnks[i].id,'');
			else dropdown_disp(colm2_lnks[i].id,'none');
	}
}
function dropdown_show_dropdown(o){
	dropdown_onMouseOver_stay();
	dropdown_toggle_dropdown('none');
	dropdown_n = dropdown_get_this_button_index(o);
	
	dropdown_onMouseOver_stay();
	pos=Position.get(o);
	x=91;
	Position.set('dropdown'+dropdown_n+'_dropdown',pos.left,pos.top+16);
	dropdown_toggle_dropdown('');
}

function feed_create_dropdown(){
	// This last index of dropdown buttons, so far
	dropdown_t = document.getElementsByName('dropdown_dd').length - 1;
	
	dropdown_c='#dropdown'+dropdown_t+'_dropdown{margin:0;padding:2px;border:1px solid #CCC;background-color:#FFF;overflow:hidden;z-index:9999;position:absolute;}';
	dropdown_c+='#dropdown'+dropdown_t+'_dropdown table{border-collapse:collapse;width:auto;margin:0;padding:0;border:0;font:12px Arial, Helvetica, sans-serif}';
	dropdown_c+='#dropdown'+dropdown_t+'_dropdown table td{margin:0;padding:0;}';
	dropdown_c+='#dropdown'+dropdown_t+'_dropdown a{color:#00F;text-decoration:none;font:12px Arial,Helvetica,sans-serif;height:auto;width:auto}';
	dropdown_c+='#dropdown'+dropdown_t+'_dropdown a:visited{color:#00F}';
	dropdown_c+='#dropdown'+dropdown_t+'_dropdown a:hover{color:#000;border:1px solid #CCC}';
	dropdown_c+='#dropdown'+dropdown_t+'_srch{color:#CCC;font:12px;padding:2px 0 2px 2px;border:1px solid;background-color:#FFF;width:100%}';
	dropdown_c+='.dropdown_srch_container{padding:9px;margin-bottom:2px;border:0;background-color:#EEE}';
	dropdown_c+='.dropdown_i{display:block;padding:6px;border:1px solid #FFF}';
	dropdown_c+='.dropdown_i:hover{background-color:#EEE}';
	dropdown_c+='.dropdown_left{float:left; width:150px;}';
	dropdown_c+='.dropdown_clear{clear:both}';
	dropdown_c+='.dropdown_ftr a{display:block;margin-top:2px;background-color:#EEE;border:1px solid #EEE;padding:3px;text-align:center}';
	
	var dropdown_s = document.createElement('style');
	dropdown_s.setAttribute("type","text/css");
	if(dropdown_s.styleSheet) dropdown_s.styleSheet.cssText=dropdown_c;
	else{