用javascript实现画板的代码

        { 
            this.container.childNodes[this.trans(p)].style.backgroundColor=color; 
        } 
        this.trans=function(p) 
        { 
            return p[0]+p[1]*width; 
        } 

        container=null; 
    } 
    function Console(width,height,command) 
    { 
        var container=document.createElement("div"); 
        this.container=container; 

        container.runtimeStyle.width=(width); 
        container.runtimeStyle.height=(height); 
        container.runtimeStyle.margin="0px"; 
        container.runtimeStyle.backgroundColor="black"; 
        container.runtimeStyle.fontFamily="Terminal"; 
        container.runtimeStyle.color="white"; 
        container.runtimeStyle.fontSize="16px"; 
        this.output=document.createElement("div"); 
        container.appendChild(this.output); 
        container.innerHTML+="js>" 
        this.input=document.createElement("input"); 
        container.appendChild(this.input); 
        this.input.runtimeStyle.backgroundColor="black"; 
        this.input.runtimeStyle.borderWidth="0px"; 
        this.input.runtimeStyle.color="white"; 
        this.input.runtimeStyle.fontFamily="Terminal"; 
        this.input.runtimeStyle.width="90%" 
        this.input.runtimeStyle.fontSize="16px" 
        this.input.runtimeStyle.position="relative"; 
        this.input.runtimeStyle.top="2px"; 
        command=command||function(str) 
        {