div_display.js

页面变暗效果 :页面变暗效果通过js把Div显示的内容变暗用做提示用

function MessageBox(){} 
MessageBox.alert = MessageBox$alert;
MessageBox.confirm = MessageBox$confirm;
MessageBox.create = MessageBox$create;
MessageBox.setSize = MessageBox$setSize;
MessageBox.close = MessageBox$close;

MessageBox.divConfig= {'id':'div1','bgColor':'green','zIndex':1000};  
MessageBox.tableConfig= 
{
    'id':'table1',
    'bgColor':'white',
    'width':'250px',
    'height':'100px',
    'borderColor':'lightblue',
    'titlebgColor':'aliceblue'
};

function MessageBox$alert( message ,callBack )
{
    MessageBox.create( message );
    var btn = document.createElement('input');
    btn.type = 'button';
    btn.value = '确定';
    if( callBack != null )
    {
        btn.attachEvent('onclick',function(){MessageBox.close();callBack();});
    }
    else    
    {
        btn.attachEvent('onclick',function(){MessageBox.close();});
    }
    
    var table = document.getElementById(MessageBox.tableConfig['id']);   
    table.rows[2].cells[0].innerHTML = '';
    table.rows[2].cells[0].appendChild(btn);
}

function MessageBox$confirm( message,callBack )
{
    MessageBox.create( message );
        
    var btnOK = document.createElement('input');
    btnOK.type = 'button';
    btnOK.value = '确定';
    btnOK.style.marginRight = '10px';
    if( callBack != null )
    {
        btnOK.attachEvent('onclick',function(){MessageBox.close();callBack( true );});
    }
    else    
    {
        btnOK.attachEvent('onclick',function(){MessageBox.close();});
    }  
    
    var btnCANCEL = document.createElement('input');
    btnCANCEL.type = 'button';
    btnCANCEL.value = '取消';
    if( callBack != null )
    {
        btnCANCEL.attachEvent('onclick',function(){MessageBox.close();callBack( false );});
    }
    else    
    {
        btnCANCEL.attachEvent('onclick',function(){MessageBox.close();});
    }
    
    var table = document.getElementById(MessageBox.tableConfig['id']);
    table.rows[2].cells[0].innerHTML = '';
    table.rows[2].cells[0].appendChild(btnOK);
    table.rows[2].cells[0].appendChild(btnCANCEL);
}

function MessageBox$create( message )
{
    var divId = MessageBox.divConfig['id'];
    var tableId = MessageBox.tableConfig['id'];
    var div = document.getElementById( divId );
    var table = document.getElementById(tableId);
    var divConfig = MessageBox.divConfig;
    var tableConfig = MessageBox.tableConfig;
    
    if( div == null )
    {
        div = document.createElement('<div style="filter:alpha(opacity=40);position:absolute;top:0px;left:0px;"></div>');
        div.id = divId;
        div.style.backgroundColor = divConfig['bgColor'];
        div.style.zIndex = divConfig['zIndex'];
        
        document.body.appendChild( div );
        
        var frame = document.createElement('<iframe style="filter:alpha(opacity=0);position:absolute;left:0px; top:0px; border-style:none;width:100%;height:100%;"></iframe>');
        frame.style.zIndex = divConfig['zIndex']-1;
        div.appendChild( frame );
        
        var contentH = parseFloat( tableConfig['height'] ) - 50;
        var strHTML = '<table id="'+tableId+'" style="position: absolute; filter : progid:DXImageTransform.Microsoft.DropShadow(color=#666666,offX=3,offY=3,positives=true);font-size:12px; border: '+ tableConfig['borderColor'] +' 1px solid; " cellpadding="2" cellspacing="0">'
            +'<tr>'
            +    '<td style="height:20px; background-color: '+tableConfig['titlebgColor']+';">提示信息'
            +    '</td>'
            +'</tr>'
            +'<tr>'
            +    '<td style="height:'+contentH+'px;text-align:center;word-break:break-all;">'
            +    '</td>'
            +'</tr>'
            +'<tr>'
            +    '<td style="height:30px;text-align:center;">'           
            +'</tr>'
            +'</table>';
        
        document.body.insertAdjacentHTML('afterBegin',strHTML);
        
        table = document.getElementById( tableId ); 
        table.style.backgroundColor = tableConfig['bgColor'];
        table.style.width = tableConfig['width'];
        table.style.height = tableConfig['height'];
        table.style.zIndex = divConfig['zIndex'] + 1;       
 
    }
    
    div.style.display = '';  
    table.style.display = '';
    
    table.rows[1].cells[0].innerHTML = message;    
    
    MessageBox.setSize(div,table); 
    
    window.attachEvent("onresize", function(){ MessageBox.setSize(div,table) } );  
    window.attachEvent("onscroll", function(){ MessageBox.setSize(div,table) } ); 
    
}

function MessageBox$setSize(div,table)
{    
    var sw = parseFloat(document.documentElement.scrollWidth);
    var cw = parseFloat(document.documentElement.clientWidth);
    var sh = parseFloat(document.documentElement.scrollHeight);
    var ch = parseFloat(document.documentElement.clientHeight);    
    
    div.style.width = sw >= cw?sw:cw;    
    div.style.height= sh >= ch?sh:ch;    
    
    table.style.left = parseFloat(document.documentElement.scrollLeft) +  cw/2 -  parseFloat(table.clientWidth)/2;
    table.style.top = parseFloat(document.documentElement.scrollTop) +  ch/2 -  parseFloat(table.clientHeight)/2;
}

function MessageBox$close()
{
    document.getElementById(MessageBox.tableConfig['id']).style.display = 'none';
    document.getElementById(MessageBox.divConfig['id']).style.display = 'none';  
}