class f{ a:number; b:number; } function sample(){ var f1=new f(); f1.a=200; f1.b=200; var sub=new svgpaint(); str="<svg width=\"500\" height=\"500\">"; str=str+sub.rect(f1.a,f1.b,100,100,"red"); str=str+"</svg>"; $("#memo").html(str); }