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function co(pageno,which){if(hd+1<=pageno&&pageno<af){al[o][which].isLoaded=false;if(which==PAGE_LEFT)al[o][which].img.onload=sy;else al[o][which].img.onload=ta;al[o][which].img.onerror=tb;al[o][which].img.src=da('medium',pageno);}else{ej++}}function sy(){al[o][PAGE_LEFT].isLoaded=true;if(o==r)LeftBottomImg.src=al[o][PAGE_LEFT].img.src;else if(o==v)LeftTopImg.src=al[o][PAGE_LEFT].img.src;ej++}function ta(){al[o][PAGE_RIGHT].isLoaded=true;if(o==r)RightBottomImg.src=al[o][PAGE_RIGHT].img.src;else if(o==v)RightTopImg.src=al[o][PAGE_RIGHT].img.src;ej++}function jh(pageno){var imagePage=new Array(2);imagePage[0]=new imageObject();imagePage[1]=new imageObject();al[pageno]=imagePage}function imageObject(){this.isLoaded=false;this.img=new Image();}function tb(){vp=true}function da(size,pageno){if(pageno==-1||pageno>=af)return"";else{if(fq&&fp&&EN_FULLDRAW)return fd+"ext_"+size+'/'+fu(imagePageList[pageno]).toUpperCase()+".jpg";else return fd+size+'/'+fu(imagePageList[pageno]).toUpperCase()+".jpg"}}function vq(pageno){if(0<=pageno&&pageno<af){largeSizeImage.src=da('middle',pageno);largeSizeImage.onload=tc}}function tc(){LargeImageSrc.src=largeSizeImage.src}